US4715931A - Process for inhibiting aluminum hydroxide deposition in papermaking felts - Google Patents

Process for inhibiting aluminum hydroxide deposition in papermaking felts Download PDF

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Publication number
US4715931A
US4715931A US07/029,827 US2982787A US4715931A US 4715931 A US4715931 A US 4715931A US 2982787 A US2982787 A US 2982787A US 4715931 A US4715931 A US 4715931A
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US
United States
Prior art keywords
acid
carboxylic acid
felt
aluminum hydroxide
aqueous medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/029,827
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English (en)
Inventor
Alan J. Schellhamer
Daniel J. Barnett
Abdul Q. Khan
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Hercules LLC
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Betz Laboratories Inc
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Publication date
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Priority to US07/029,827 priority Critical patent/US4715931A/en
Assigned to BETZ LABORATORIES, INC., 4636 SOMERTON RD., TREVOSE, PA 19047 A CORP. OF PA reassignment BETZ LABORATORIES, INC., 4636 SOMERTON RD., TREVOSE, PA 19047 A CORP. OF PA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BARNETT, DANIEL J., KHAN, ABDUL Q., SCHELLHAMER, ALAN J.
Application granted granted Critical
Publication of US4715931A publication Critical patent/US4715931A/en
Priority to NZ223364A priority patent/NZ223364A/xx
Priority to AU11316/88A priority patent/AU597785B2/en
Priority to EP88302497A priority patent/EP0284344A3/en
Priority to KR1019880003080A priority patent/KR960007322B1/ko
Assigned to BETZDEARBORN INC. reassignment BETZDEARBORN INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: BETZ LABORATORIES, INC.
Assigned to BANK OF AMERICA, N.A., AS COLLATERAL AGENT reassignment BANK OF AMERICA, N.A., AS COLLATERAL AGENT NOTICE OF GRANT OF SECURITY INTEREST Assignors: AQUALON COMPANY, A DELAWARE PARTNERSHIP, ATHENS HOLDINGS, INC., A DELAWARE CORPORATION, BETZDEARBORN CHINA, LTD., A DELAWARE CORPORATION, BETZDEARBORN EUROPE, INC., A PENNSYLVANIA CORPORATION, BETZDEARBORN INC., A PENNSYLVANIA CORPORATION, BETZDEARBORN INTERNATIONAL, INC., A PENNSYLVANIA CORPORATION, BL CHEMICALS INC., A DELAWARE CORPORATION, BL TECHNOLOGIES, INC., A DELAWARE CORPORATION, BLI HOLDINGS CORP., A DELAWARE CORPORATION, CHEMICAL TECHNOLOGIES INDIA, LTD., A DELAWARE CORPORATION, COVINGTON HOLDINGS, INC., A DELAWARE CORPORATION, D R C LTD., A DELAWARE CORPORATION, EAST BAY REALTY SERVICES, INC., A DELAWARE CORPORATION, FIBERVISIONS INCORPORATED, A DELAWARE CORPORATION, FIBERVISIONS PRODUCTS, INC., A GEORGIA CORPORATION, FIBERVISIONS, L.L.C, A DELAWARE LIMITED LIABILITY COMPANY, FIBERVISIONS, L.P., A DELAWARE LIMITED PARTNERSHIP, HERCULES CHEMICAL CORPORATION, A DELAWARE CORPORATION, HERCULES COUNTRY CLUB, INC., A DELAWARE CORPORATION, HERCULES CREDIT, INC., A DELAWARE CORPORATION, HERCULES EURO HOLDINGS, LLC, A DELAWARE LIMITED LIABILITY COMPANY, HERCULES FINANCE COMPANY, A DELAWARE PARTNERSHIP, HERCULES FLAVOR, INC., A DELAWARE CORPORATION, HERCULES INCORPORATED, A DELAWARE CORPORATION, HERCULES INTERNATIONAL LIMITED L.L.C., A DELAWARE LIMITED LIABILITY COMPANY, HERCULES INTERNATIONAL LIMITED, A DELAWARE CORPORATION, HERCULES INVESTMENTS, LLC, A DELAWARE LIMITED LIABILITY COMPANY, HERCULES SHARED SERVICES CORPORATION, A DELAWARE CORPORATION, HISPAN CORPORATION, A DELAWARE CORPORATION, WSP, INC., A DELAWARE CORPORATION
Assigned to HERCULES INCORPORATED reassignment HERCULES INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BETZDEARBORN, INC.
Assigned to CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT reassignment CREDIT SUISSE FIRST BOSTON, AS COLLATERAL AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HERCULES INCORPORATED
Assigned to D R C LTD., HERCULESE FLAVOR, INC., EAST BAY REALTY SERVICES, INC., HERCULES SHARED SERVICES CORPORATION, HISPAN CORPORATION, HERCULES CREDIT, INC., HERCULES INTERNATIONAL LIMITED, BETZDEARBORN CHINA, LTD., CHEMICAL TECHNOLOGIES INDIA, LTD., HERCULES COUNTRY CLUB, INC., BLI HOLDING CORPORATION, FIBERVISIONS, L.L.C., FIBERVISION INCORPORATED, ATHENS HOLDINGS, INC., BL TECHNOLOGIES, INC., HERCULES CHEMICAL CORPORATION, BL CHEMICALS INC., BETZDEARBORN, INC., HERCULES INVESTMENTS, LLC, FIBERVISIONS PRODUCTS, INC., FIBERVISIONS, L.P., AQUALON COMPANY, HERCULES INCORPORATED, HERCULES INTERNATIONAL LIMITED, L.L.C., COVINGTON HOLDINGS, INC., BETZDEARBORN INTERNATIONAL, INC., WSP, INC., HERCULES FINANCE COMPANY, HERCULES EURO HOLDINGS, LLC, BETZDEARBORN EUROPE, INC. reassignment D R C LTD. RELEASE OF SECURITY AGREEMENT Assignors: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Anticipated expiration legal-status Critical
Assigned to HERCULES INCORPORATED reassignment HERCULES INCORPORATED PATENT TERMINATION CS-013608-0107 Assignors: CREDIT SUISSE, CAYMAN ISLANDS BRANCH
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/32—Washing wire-cloths or felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/008—Prevention of corrosion or formation of deposits on pulp-treating equipment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/30—Protecting wire-cloths from mechanical damage
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts

Definitions

  • This invention relates to inhibiting deposition of aluminum hydroxide in felts of a papermaking system. More particularly, this invention relates to inhibiting aluminum hydroxide deposition in a felt in a press section of a papermaking system wherein the felt is prone to such deposition and the felt is conditioned by showering with an aqueous medium.
  • Effective chemical conditioning of a press felt helps to reduce the rate of felt compaction, maintain maximum felt absorbency, and prolong the felt's useful operating life.
  • a felt must be kept clean of filling materials that adhere to the felt fibers and accumulate in the felt structure. These filling materials not only impede the flow of water through the felt, but also create adhesion between felt fibers, thus increasing the tendency for the felt's structure to compact and lose absorption capacity.
  • Effective felt conditioning is particularly important for high synthetic fiber content felts which are seldom removed because they are worn out. They are generally removed because they become filled and compacted to the point where adequate absorption capacity is lost.
  • This invention relates to processes for inhibiting deposition of aluminum hydroxide in felts of a papermaking system which comprises adding to the felts an effective inhibiting amount of a hydroxylated carboxylic acid having at least 1 hydroxyl group and at least 2 carboxyl groups.
  • the molecular weight of the carboxylic acid is from about 100 to about 200 and, preferably, the carboxylic acid is selected from the group consisting of tartaric acid, malic acid, citric acid, mesoxalic acid, tartronic acid and tetrahydroxy succinic acid.
  • the present invention pertains to a process for inhibiting aluminum hydroxide deposition in a felt in a press section of a papermaking system wherein the felt is prone to such deposition and the felt is conditioned by showering with an aqueous medium, which comprises adding to the aqueous medium an effective inhibiting amount of a hydroxylated carboxylic acid having at least one hydroxyl group and at least two carboxyl groups.
  • the carboxylic acids can be further characterized in that they are low molecular weight, hydroxylated di- or tri-carboxylic acids containing from about 3 to about 6 carbon atoms.
  • the carboxylic acids of this invention generally have a molecular weight of from about 100 to about 200.
  • carboxylic acids include: tartaric acid (2-3-dihydroxybutanedioic acid); malic acid [hydroxy-methyl-malonic(propanedioic)acid]; citric acid (2-hydroxy-1,2,3-propane tricarboxylic acid); mesoxalic acid [dihydroxy malonic(propanedioic)acid]; tartronic acid [hydroxy malonic(propanedioic)acid]; and tetrahydroxy succinic(butanedioic)acid.
  • the carboxylic acid is selected from the group consisting of tartaric acid, malic acid and citric acid.
  • the carboxylic acids of this invention are a limited class of compounds which have chemical and structural features that provide unexpected efficacy in inhibiting aluminum hydroxide deposition in the felts of papermaking systems.
  • the hydroxylation feature (particularly in relationship to the compounds' relatively low molecular weight) is responsible for the unique reactivity of these compounds toward aluminum hydroxide via hydrogen bonding forces resulting in their rapid adsorption.
  • the multiple carboxylation feature (particularly in relationship to the compounds' relatively low molecular weight) is responsible for these compounds' relatively high anionic charge density and their resulting unique ability to disperse and/or solubilize aluminum hydroxide via a ligand exchange mechanism.
  • these carboxylic acids have sufficiently low pka's and it is believed that this feature allows the multiple carboxyl groups of these compounds to be sufficiently deprotonated in the necessary application pH range to produce their necessary anionic charge density. Furthermore, it is believed that the relatively low molecular weight of these carboxylic acids aids the reactivity of these compounds and also produces their high performance at minimum ratios of compound weight to aluminum hydroxide weight.
  • both the aluminum hydroxide controlling component and the organic deposit controlling components of the felt conditioner must be capable of acting within the time frame of seconds. This is due to the fact that the distance of felt travel between the felt conditioner application points (usually a shower from which the aqueous medium is sprayed) and the felt suction (uhle) box is only within several tens of feet and, at machine speeds of up to several thousand feed per minute, this only leaves a response time on the order of seconds before the bulk of the felt conditioner components (along with any solubilized contaminants) are removed from the felt at the suction box.
  • the rapid reactivity feature of this invention also distinguishes this process from the well-established practice of utilizing functionally similar chelating or complexing agents in alkaline cleaning or "boil-out" solutions to remove many types of deposited salts, including metal hydroxides.
  • a time factor of up to several hours is required due to the relatively slow kinetics associated with relatively insoluble salt dissolution and/or ligand exchange interactions.
  • the latter application requires strong alkaline solution conditions to allow the complexing agents to be active, while the instant invention can function in neutral to mildy acidic conditions.
  • the present invention further provides an improvement in the process for conditioning of press felts in papermaking systems producing paper or paperboard from pulp suspensions containing alum (aluminum sulfate) wherein aluminum hydroxide is deposited in the felts and a surfactant is added to the aqueous medium or shower water to inhibit felt filling and compaction. It has been found by the present inventors that optimal activity of surfactants known in the art for inhibiting felt filling and compaction caused by organic contaminants, such as tacky wood pitch components or rosin size, falls within a higher pH range ( ⁇ 5.5-7.5) than that traditionally employed with the use of strong acid-based felt conditioners.
  • surfactants which may be utilized in accordance with this invention include: octyl phenol ethoxylates:
  • the amounts or concentrations of the aforesaid carboxylic acids and surfactants can vary depending on, among other things, the pH of the aqueous medium, the volume of felt shower water applied, the concentration of aluminum and the concentration of organic contaminants. While, from the disclosure of this invention, it would be within the capability of those skilled in the art to find by simple experimentation the optimum amounts or concentrations of carboxylic acid and surfactant for any particular system, generally the total amount of either the carboxylic acid or the surfactant which is added to the aqueous medium is from about 10 parts to about 1,000 parts per million parts of the aqueous medium. Preferably, both the carboxylic acid and surfactant is added in an amount from about 100 parts to about 300 parts per million. Additionally, it is preferred that the weight ratio of carboxylic acid:surfactant is from about 1:9 to about 9:1 based on the total combined weight of these two components.
  • the aforementioned carboxylic acids and surfactants are generally presently available commercially. These compounds can be added to the aqueous medium by any conventional method.
  • the pH of the aqueous medium is from about 4.8 to about 8.0 since this is the approximate range in which a sufficient quantity of insoluble aluminum hydroxide can precipitate alone or in conjunction with other substances from the aqueous medium and cause the felts to become prematurely filled and compacted.
  • the aqueous medium can be shower water which is sprayed from shower heads onto the felts in the press section of a typical papermaking system known in the art.
  • the aqueous medium may contain other known additives, such as deposit control agents, dispersants and solvents, which are compatible with the hydroxylated carboxylic acids and surfactants utilized in accordance with this invention.
  • Citric acid hydroxylated carboxylic acid
  • salt form sodium citrate to control aluminum hydroxide deposition.
  • Aluminum ion in the form of alum (aluminum sulfate) was added to water to produce 104 ppm Al +3 solution.
  • the pH of the solution was readjusted to about 6.0 with caustic, thereby causing the aluminum to precipitate as insoluble aluminum hydroxide, which created turbidity in the solution.
  • Citric acid and sodium citrate were added at various concentrations and the results are reported in Table I below.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
US07/029,827 1987-03-24 1987-03-24 Process for inhibiting aluminum hydroxide deposition in papermaking felts Expired - Lifetime US4715931A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US07/029,827 US4715931A (en) 1987-03-24 1987-03-24 Process for inhibiting aluminum hydroxide deposition in papermaking felts
NZ223364A NZ223364A (en) 1987-03-24 1988-01-29 Method of preventing deposition of aluminium hydroxide on to felts during papermaking
AU11316/88A AU597785B2 (en) 1987-03-24 1988-02-04 Process for inhibiting aluminum hydroxide deposition in papermaking felts
EP88302497A EP0284344A3 (en) 1987-03-24 1988-03-22 Process for inhibiting aluminium hydroxide deposition in papermaking felts
KR1019880003080A KR960007322B1 (ko) 1987-03-24 1988-03-23 제지용 펠트내에서의 수산화알루미늄 침착을 억제하는 방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/029,827 US4715931A (en) 1987-03-24 1987-03-24 Process for inhibiting aluminum hydroxide deposition in papermaking felts

Publications (1)

Publication Number Publication Date
US4715931A true US4715931A (en) 1987-12-29

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US07/029,827 Expired - Lifetime US4715931A (en) 1987-03-24 1987-03-24 Process for inhibiting aluminum hydroxide deposition in papermaking felts

Country Status (5)

Country Link
US (1) US4715931A (xx)
EP (1) EP0284344A3 (xx)
KR (1) KR960007322B1 (xx)
AU (1) AU597785B2 (xx)
NZ (1) NZ223364A (xx)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4861429A (en) * 1988-07-29 1989-08-29 Betz Laboratories, Inc. Process for inhibiting white pitch deposition in papermaking felts
US4895622A (en) * 1988-11-09 1990-01-23 Betz Laboratories, Inc. Press felt conditioner for neutral and alkaline papermaking systems
EP0359590A2 (en) * 1988-09-16 1990-03-21 Grace Dearborn Inc. Controlling deposits on paper machine felts and the like
US4975150A (en) * 1987-11-26 1990-12-04 Hakuto Chemical Co., Ltd. Method for preventing plugging of suction roll of paper machine and anti-plugging agent therefor
US5223097A (en) * 1986-01-09 1993-06-29 W. R. Grace Ab Method for controlling pitch on a paper-making machine
US5626720A (en) * 1986-01-09 1997-05-06 W.R. Grace & Co.-Conn. Method for controlling pitch on a papermaking machine
US5651812A (en) * 1994-11-22 1997-07-29 Betzdearborn Inc. Agent for treatment of paper machine press section felts and its use
US5962368A (en) * 1998-06-03 1999-10-05 Kolorfusion International Inc. Process for decoration by sublimation using heat shrink film
US6369010B1 (en) 1999-12-01 2002-04-09 Vinings Industries, Inc. Method and composition for preventing pitch deposits in paper mills using resinous mechanical pulps
US6562743B1 (en) 1998-12-24 2003-05-13 Bki Holding Corporation Absorbent structures of chemically treated cellulose fibers
US20070017648A1 (en) * 2005-06-24 2007-01-25 Pease Jacqueline K Felt and equipment surface conditioner
US8946100B2 (en) 2003-12-19 2015-02-03 Buckeye Technologies Inc. Fibers of variable wettability and materials containing the fibers
US20170029748A1 (en) * 2015-07-29 2017-02-02 Dubois Chemicals, Inc. Method of improving paper machine fabric performance
US9797091B2 (en) 2014-11-25 2017-10-24 Buckman Laboratories International, Inc. Felt conditioner and cleaner
US20180100270A1 (en) * 2015-03-27 2018-04-12 Maintech Co., Ltd. Contamination inhibitor composition

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US210690A (en) * 1878-12-10 Improvement in preparing paper to take copies
US2017640A (en) * 1932-01-06 1935-10-15 Ubbelohde Leo Treatment of felts for paper machines
US2110032A (en) * 1936-05-24 1938-03-01 Int Paper Co Process of treating wood-pulp and the like
US2312710A (en) * 1940-03-18 1943-03-02 Albany Felt Co Mechanical fabric
US2692183A (en) * 1949-07-07 1954-10-19 Upson Co Method for treating cellulose and product thereof
US2703279A (en) * 1949-05-31 1955-03-01 British Celanese Organic acid digestion of lignocellulose
US3071504A (en) * 1958-05-12 1963-01-01 Us Movidyn Corp Paper mill boil out methods and compositions
GB929971A (en) * 1959-03-31 1963-06-26 Hutter & Schrantz Ag Siebwaren Improvements in or relating to methods of improving the properties of paper maker's felts and felt cloths
US3226179A (en) * 1962-10-01 1965-12-28 Huyck Corp Papermaker's felt, woven fabrics and fibers of wool modified with an aldehyde - 4,4 - bis(4 - hydroxy phenyl) pentanoic acid reaction product and the production thereof
US3306810A (en) * 1964-06-08 1967-02-28 Buckman Labor Inc Compositions containing methylene bisthiocyanate, dispersant and a dimethylamide and processes of inhibiting microbiological deterioration utilizing said composition
US3398047A (en) * 1964-10-08 1968-08-20 Nalco Chemical Co Pitch prevention by addition of ligand and organic sulfonate
US3406089A (en) * 1964-10-02 1968-10-15 Kimberly Clark Co Process for the digestion of cellulosic material by enzymatic action of trametes suaveolens
US3573089A (en) * 1966-11-15 1971-03-30 Sayama Seisakusho Kk Method of manufacturing screen cloths for papermaking
US3630830A (en) * 1969-06-30 1971-12-28 Eastman Kodak Co Method for surface sizing of paper
US3652386A (en) * 1968-10-29 1972-03-28 Mo Och Domsjoe Ab Process for treating cellulosic materials with alkali and oxygen in the presence of complex magnesium salts

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US210690A (en) * 1878-12-10 Improvement in preparing paper to take copies
US2017640A (en) * 1932-01-06 1935-10-15 Ubbelohde Leo Treatment of felts for paper machines
US2110032A (en) * 1936-05-24 1938-03-01 Int Paper Co Process of treating wood-pulp and the like
US2312710A (en) * 1940-03-18 1943-03-02 Albany Felt Co Mechanical fabric
US2703279A (en) * 1949-05-31 1955-03-01 British Celanese Organic acid digestion of lignocellulose
US2692183A (en) * 1949-07-07 1954-10-19 Upson Co Method for treating cellulose and product thereof
US3071504A (en) * 1958-05-12 1963-01-01 Us Movidyn Corp Paper mill boil out methods and compositions
GB929971A (en) * 1959-03-31 1963-06-26 Hutter & Schrantz Ag Siebwaren Improvements in or relating to methods of improving the properties of paper maker's felts and felt cloths
US3226179A (en) * 1962-10-01 1965-12-28 Huyck Corp Papermaker's felt, woven fabrics and fibers of wool modified with an aldehyde - 4,4 - bis(4 - hydroxy phenyl) pentanoic acid reaction product and the production thereof
US3292992A (en) * 1962-10-01 1966-12-20 Huyck Corp Process for treating papermakers' felt and products obtained therefrom
US3306810A (en) * 1964-06-08 1967-02-28 Buckman Labor Inc Compositions containing methylene bisthiocyanate, dispersant and a dimethylamide and processes of inhibiting microbiological deterioration utilizing said composition
US3406089A (en) * 1964-10-02 1968-10-15 Kimberly Clark Co Process for the digestion of cellulosic material by enzymatic action of trametes suaveolens
US3398047A (en) * 1964-10-08 1968-08-20 Nalco Chemical Co Pitch prevention by addition of ligand and organic sulfonate
US3573089A (en) * 1966-11-15 1971-03-30 Sayama Seisakusho Kk Method of manufacturing screen cloths for papermaking
US3652386A (en) * 1968-10-29 1972-03-28 Mo Och Domsjoe Ab Process for treating cellulosic materials with alkali and oxygen in the presence of complex magnesium salts
US3630830A (en) * 1969-06-30 1971-12-28 Eastman Kodak Co Method for surface sizing of paper

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
"Cleaning and Conditioning of Papermakers Felts", Shannon V. West, Southern Pulp and Paper Manufacturer, Sep. 10, 1968, pp. 60, 62.
"Felt Conditioner Applications", Betz PaperChem Pulp and Paper Reference Manual, 1983, Section 6.1, pp. 1-4.
"The Case for Continuous Cleaning of Felts", David G. Elliott and James L. Hanchette, Southern Pulp and Paper Manufacturer, Jun. 10, 1963, pp. 43-44, and 46.
Cleaning and Conditioning of Papermakers Felts , Shannon V. West, Southern Pulp and Paper Manufacturer, Sep. 10, 1968, pp. 60, 62. *
Felt Conditioner Applications , Betz PaperChem Pulp and Paper Reference Manual, 1983, Section 6.1, pp. 1 4. *
The Case for Continuous Cleaning of Felts , David G. Elliott and James L. Hanchette, Southern Pulp and Paper Manufacturer, Jun. 10, 1963, pp. 43 44, and 46. *

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5223097A (en) * 1986-01-09 1993-06-29 W. R. Grace Ab Method for controlling pitch on a paper-making machine
US5626720A (en) * 1986-01-09 1997-05-06 W.R. Grace & Co.-Conn. Method for controlling pitch on a papermaking machine
US4975150A (en) * 1987-11-26 1990-12-04 Hakuto Chemical Co., Ltd. Method for preventing plugging of suction roll of paper machine and anti-plugging agent therefor
US4861429A (en) * 1988-07-29 1989-08-29 Betz Laboratories, Inc. Process for inhibiting white pitch deposition in papermaking felts
EP0359590A2 (en) * 1988-09-16 1990-03-21 Grace Dearborn Inc. Controlling deposits on paper machine felts and the like
EP0359590A3 (en) * 1988-09-16 1991-11-27 Grace Dearborn Inc. Controlling deposits on paper machine felts and the like
US4895622A (en) * 1988-11-09 1990-01-23 Betz Laboratories, Inc. Press felt conditioner for neutral and alkaline papermaking systems
US5651812A (en) * 1994-11-22 1997-07-29 Betzdearborn Inc. Agent for treatment of paper machine press section felts and its use
US5776310A (en) * 1994-11-22 1998-07-07 Betzdearborn Inc. Method for treatment of paper machine press section felts
US5962368A (en) * 1998-06-03 1999-10-05 Kolorfusion International Inc. Process for decoration by sublimation using heat shrink film
US20030157857A1 (en) * 1998-12-24 2003-08-21 Bki Holding Corporation Absorbent structures of chemically treated cellulose fibers
US6562743B1 (en) 1998-12-24 2003-05-13 Bki Holding Corporation Absorbent structures of chemically treated cellulose fibers
US6770576B2 (en) 1998-12-24 2004-08-03 Bki Holding Corporation Absorbent structures of chemically treated cellulose fibers
US20040224588A1 (en) * 1998-12-24 2004-11-11 Bki Holding Corporation Absorbent structures of chemically treated cellulose fibers
US6369010B1 (en) 1999-12-01 2002-04-09 Vinings Industries, Inc. Method and composition for preventing pitch deposits in paper mills using resinous mechanical pulps
US8946100B2 (en) 2003-12-19 2015-02-03 Buckeye Technologies Inc. Fibers of variable wettability and materials containing the fibers
US10300457B2 (en) 2003-12-19 2019-05-28 Georgia-Pacific Nonwovens LLC Fibers of variable wettability and materials containing the fibers
US7534324B2 (en) 2005-06-24 2009-05-19 Hercules Incorporated Felt and equipment surface conditioner
US20070017648A1 (en) * 2005-06-24 2007-01-25 Pease Jacqueline K Felt and equipment surface conditioner
US9797091B2 (en) 2014-11-25 2017-10-24 Buckman Laboratories International, Inc. Felt conditioner and cleaner
US20180100270A1 (en) * 2015-03-27 2018-04-12 Maintech Co., Ltd. Contamination inhibitor composition
US10619299B2 (en) * 2015-03-27 2020-04-14 Maintech Co., Ltd. Contamination inhibitor composition
US20170029748A1 (en) * 2015-07-29 2017-02-02 Dubois Chemicals, Inc. Method of improving paper machine fabric performance
US10851330B2 (en) * 2015-07-29 2020-12-01 Dubois Chemicals, Inc. Method of improving paper machine fabric performance

Also Published As

Publication number Publication date
AU597785B2 (en) 1990-06-07
KR960007322B1 (ko) 1996-05-30
KR880011409A (ko) 1988-10-28
NZ223364A (en) 1989-07-27
EP0284344A2 (en) 1988-09-28
EP0284344A3 (en) 1989-08-09
AU1131688A (en) 1988-09-22

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